Remove two unused RPC functions
[ganeti-local] / lib / rpc.py
index 9fd5459..c6e7cb2 100644 (file)
 # R0904: Too many public methods
 
 import os
-import socket
-import httplib
 import logging
+import zlib
+import base64
 
 from ganeti import utils
 from ganeti import objects
 from ganeti import http
 from ganeti import serializer
+from ganeti import constants
+from ganeti import errors
+
+# pylint has a bug here, doesn't see this import
+import ganeti.http.client  # pylint: disable-msg=W0611
+
+
+# Module level variable
+_http_manager = None
+
+
+def Init():
+  """Initializes the module-global HTTP client manager.
+
+  Must be called before using any RPC function.
+
+  """
+  global _http_manager # pylint: disable-msg=W0603
+
+  assert not _http_manager, "RPC module initialized more than once"
+
+  http.InitSsl()
+
+  _http_manager = http.client.HttpClientManager()
+
+
+def Shutdown():
+  """Stops the module-global HTTP client manager.
+
+  Must be called before quitting the program.
+
+  """
+  global _http_manager # pylint: disable-msg=W0603
+
+  if _http_manager:
+    _http_manager.Shutdown()
+    _http_manager = None
+
+
+class RpcResult(object):
+  """RPC Result class.
+
+  This class holds an RPC result. It is needed since in multi-node
+  calls we can't raise an exception just because one one out of many
+  failed, and therefore we use this class to encapsulate the result.
+
+  @ivar data: the data payload, for successful results, or None
+  @ivar call: the name of the RPC call
+  @ivar node: the name of the node to which we made the call
+  @ivar offline: whether the operation failed because the node was
+      offline, as opposed to actual failure; offline=True will always
+      imply failed=True, in order to allow simpler checking if
+      the user doesn't care about the exact failure mode
+  @ivar fail_msg: the error message if the call failed
+
+  """
+  def __init__(self, data=None, failed=False, offline=False,
+               call=None, node=None):
+    self.offline = offline
+    self.call = call
+    self.node = node
+
+    if offline:
+      self.fail_msg = "Node is marked offline"
+      self.data = self.payload = None
+    elif failed:
+      self.fail_msg = self._EnsureErr(data)
+      self.data = self.payload = None
+    else:
+      self.data = data
+      if not isinstance(self.data, (tuple, list)):
+        self.fail_msg = ("RPC layer error: invalid result type (%s)" %
+                         type(self.data))
+        self.payload = None
+      elif len(data) != 2:
+        self.fail_msg = ("RPC layer error: invalid result length (%d), "
+                         "expected 2" % len(self.data))
+        self.payload = None
+      elif not self.data[0]:
+        self.fail_msg = self._EnsureErr(self.data[1])
+        self.payload = None
+      else:
+        # finally success
+        self.fail_msg = None
+        self.payload = data[1]
+
+    assert hasattr(self, "call")
+    assert hasattr(self, "data")
+    assert hasattr(self, "fail_msg")
+    assert hasattr(self, "node")
+    assert hasattr(self, "offline")
+    assert hasattr(self, "payload")
+
+  @staticmethod
+  def _EnsureErr(val):
+    """Helper to ensure we return a 'True' value for error."""
+    if val:
+      return val
+    else:
+      return "No error information"
+
+  def Raise(self, msg, prereq=False, ecode=None):
+    """If the result has failed, raise an OpExecError.
+
+    This is used so that LU code doesn't have to check for each
+    result, but instead can call this function.
+
+    """
+    if not self.fail_msg:
+      return
+
+    if not msg: # one could pass None for default message
+      msg = ("Call '%s' to node '%s' has failed: %s" %
+             (self.call, self.node, self.fail_msg))
+    else:
+      msg = "%s: %s" % (msg, self.fail_msg)
+    if prereq:
+      ec = errors.OpPrereqError
+    else:
+      ec = errors.OpExecError
+    if ecode is not None:
+      args = (msg, prereq)
+    else:
+      args = (msg, )
+    raise ec(*args) # pylint: disable-msg=W0142
 
 
 class Client:
@@ -48,20 +173,21 @@ class Client:
   list of nodes, will contact (in parallel) all nodes, and return a
   dict of results (key: node name, value: result).
 
-  One current bug is that generic failure is still signalled by
+  One current bug is that generic failure is still signaled by
   'False' result, which is not good. This overloading of values can
   cause bugs.
 
   """
-  def __init__(self, procedure, args):
+  def __init__(self, procedure, body, port):
     self.procedure = procedure
-    self.args = args
-    self.body = serializer.DumpJson(args, indent=False)
-
-    self.port = utils.GetNodeDaemonPort()
-    self.nodepw = utils.GetNodeDaemonPassword()
+    self.body = body
+    self.port = port
     self.nc = {}
 
+    self._ssl_params = \
+      http.HttpSslParams(ssl_key_path=constants.NODED_CERT_FILE,
+                         ssl_cert_path=constants.NODED_CERT_FILE)
+
   def ConnectList(self, node_list, address_list=None):
     """Add a list of nodes to the target nodes.
 
@@ -92,42 +218,61 @@ class Client:
     if address is None:
       address = name
 
-    self.nc[name] = http.HttpClientRequest(address, self.port, http.HTTP_PUT,
-                                           "/%s" % self.procedure,
-                                           post_data=self.body)
+    self.nc[name] = \
+      http.client.HttpClientRequest(address, self.port, http.HTTP_PUT,
+                                    "/%s" % self.procedure,
+                                    post_data=self.body,
+                                    ssl_params=self._ssl_params,
+                                    ssl_verify_peer=True)
 
   def GetResults(self):
     """Call nodes and return results.
 
     @rtype: list
-    @returns: List of RPC results
+    @return: List of RPC results
 
     """
-    # TODO: Shared and reused manager
-    mgr = http.HttpClientManager()
-    try:
-      mgr.ExecRequests(self.nc.values())
-    finally:
-      mgr.Shutdown()
+    assert _http_manager, "RPC module not initialized"
+
+    _http_manager.ExecRequests(self.nc.values())
 
     results = {}
 
     for name, req in self.nc.iteritems():
-      if req.success and req.resp_status == http.HTTP_OK:
-        results[name] = serializer.LoadJson(req.resp_body)
+      if req.success and req.resp_status_code == http.HTTP_OK:
+        results[name] = RpcResult(data=serializer.LoadJson(req.resp_body),
+                                  node=name, call=self.procedure)
         continue
 
+      # TODO: Better error reporting
       if req.error:
         msg = req.error
       else:
         msg = req.resp_body
 
-      logging.error("RPC error from node %s: %s", name, msg)
-      results[name] = False
+      logging.error("RPC error in %s from node %s: %s",
+                    self.procedure, name, msg)
+      results[name] = RpcResult(data=msg, failed=True, node=name,
+                                call=self.procedure)
 
     return results
 
 
+def _EncodeImportExportIO(ieio, ieioargs):
+  """Encodes import/export I/O information.
+
+  """
+  if ieio == constants.IEIO_RAW_DISK:
+    assert len(ieioargs) == 1
+    return (ieioargs[0].ToDict(), )
+
+  if ieio == constants.IEIO_SCRIPT:
+    assert len(ieioargs) == 2
+    return (ieioargs[0].ToDict(), ieioargs[1])
+
+  return ieioargs
+
+
 class RpcRunner(object):
   """RPC runner class"""
 
@@ -140,8 +285,9 @@ class RpcRunner(object):
 
     """
     self._cfg = cfg
+    self.port = utils.GetDaemonPort(constants.NODED)
 
-  def _InstDict(self, instance):
+  def _InstDict(self, instance, hvp=None, bep=None):
     """Convert the given instance to a dict.
 
     This is done via the instance's ToDict() method and additionally
@@ -149,6 +295,10 @@ class RpcRunner(object):
 
     @type instance: L{objects.Instance}
     @param instance: an Instance object
+    @type hvp: dict or None
+    @param hvp: a dictionary with overridden hypervisor parameters
+    @type bep: dict or None
+    @param bep: a dictionary with overridden backend parameters
     @rtype: dict
     @return: the instance dict, with the hvparams filled with the
         cluster defaults
@@ -157,84 +307,142 @@ class RpcRunner(object):
     idict = instance.ToDict()
     cluster = self._cfg.GetClusterInfo()
     idict["hvparams"] = cluster.FillHV(instance)
+    if hvp is not None:
+      idict["hvparams"].update(hvp)
     idict["beparams"] = cluster.FillBE(instance)
+    if bep is not None:
+      idict["beparams"].update(bep)
+    for nic in idict["nics"]:
+      nic['nicparams'] = objects.FillDict(
+        cluster.nicparams[constants.PP_DEFAULT],
+        nic['nicparams'])
     return idict
 
-  def _ConnectList(self, client, node_list):
+  def _ConnectList(self, client, node_list, call):
     """Helper for computing node addresses.
 
-    @type client: L{Client}
+    @type client: L{ganeti.rpc.Client}
     @param client: a C{Client} instance
     @type node_list: list
     @param node_list: the node list we should connect
+    @type call: string
+    @param call: the name of the remote procedure call, for filling in
+        correctly any eventual offline nodes' results
 
     """
     all_nodes = self._cfg.GetAllNodesInfo()
+    name_list = []
     addr_list = []
+    skip_dict = {}
     for node in node_list:
       if node in all_nodes:
+        if all_nodes[node].offline:
+          skip_dict[node] = RpcResult(node=node, offline=True, call=call)
+          continue
         val = all_nodes[node].primary_ip
       else:
         val = None
       addr_list.append(val)
-    client.ConnectList(node_list, address_list=addr_list)
+      name_list.append(node)
+    if name_list:
+      client.ConnectList(name_list, address_list=addr_list)
+    return skip_dict
 
-  def _ConnectNode(self, client, node):
+  def _ConnectNode(self, client, node, call):
     """Helper for computing one node's address.
 
-    @type client: L{Client}
+    @type client: L{ganeti.rpc.Client}
     @param client: a C{Client} instance
     @type node: str
     @param node: the node we should connect
+    @type call: string
+    @param call: the name of the remote procedure call, for filling in
+        correctly any eventual offline nodes' results
 
     """
     node_info = self._cfg.GetNodeInfo(node)
     if node_info is not None:
+      if node_info.offline:
+        return RpcResult(node=node, offline=True, call=call)
       addr = node_info.primary_ip
     else:
       addr = None
     client.ConnectNode(node, address=addr)
 
-  def _MultiNodeCall(self, node_list, procedure, args,
-                     address_list=None):
-    c = Client(procedure, args)
-    if address_list is None:
-      self._ConnectList(c, node_list)
-    else:
-      c.ConnectList(node_list, address_list=address_list)
-    return c.GetResults()
+  def _MultiNodeCall(self, node_list, procedure, args):
+    """Helper for making a multi-node call
+
+    """
+    body = serializer.DumpJson(args, indent=False)
+    c = Client(procedure, body, self.port)
+    skip_dict = self._ConnectList(c, node_list, procedure)
+    skip_dict.update(c.GetResults())
+    return skip_dict
 
   @classmethod
   def _StaticMultiNodeCall(cls, node_list, procedure, args,
                            address_list=None):
-    c = Client(procedure, args)
+    """Helper for making a multi-node static call
+
+    """
+    body = serializer.DumpJson(args, indent=False)
+    c = Client(procedure, body, utils.GetDaemonPort(constants.NODED))
     c.ConnectList(node_list, address_list=address_list)
     return c.GetResults()
 
   def _SingleNodeCall(self, node, procedure, args):
-    """
+    """Helper for making a single-node call
 
     """
-    c = Client(procedure, args)
-    self._ConnectNode(c, node)
-    return c.GetResults().get(node, False)
+    body = serializer.DumpJson(args, indent=False)
+    c = Client(procedure, body, self.port)
+    result = self._ConnectNode(c, node, procedure)
+    if result is None:
+      # we did connect, node is not offline
+      result = c.GetResults()[node]
+    return result
 
   @classmethod
   def _StaticSingleNodeCall(cls, node, procedure, args):
+    """Helper for making a single-node static call
+
     """
+    body = serializer.DumpJson(args, indent=False)
+    c = Client(procedure, body, utils.GetDaemonPort(constants.NODED))
+    c.ConnectNode(node)
+    return c.GetResults()[node]
+
+  @staticmethod
+  def _Compress(data):
+    """Compresses a string for transport over RPC.
+
+    Small amounts of data are not compressed.
+
+    @type data: str
+    @param data: Data
+    @rtype: tuple
+    @return: Encoded data to send
 
     """
-    c = Client(procedure, args)
-    c.ConnectNode(c, node)
-    return c.GetResults().get(node, False)
+    # Small amounts of data are not compressed
+    if len(data) < 512:
+      return (constants.RPC_ENCODING_NONE, data)
+
+    # Compress with zlib and encode in base64
+    return (constants.RPC_ENCODING_ZLIB_BASE64,
+            base64.b64encode(zlib.compress(data, 3)))
 
-  def call_volume_list(self, node_list, vg_name):
+  #
+  # Begin RPC calls
+  #
+
+  def call_lv_list(self, node_list, vg_name):
     """Gets the logical volumes present in a given volume group.
 
     This is a multi-node call.
 
     """
-    return self._MultiNodeCall(node_list, "volume_list", [vg_name])
+    return self._MultiNodeCall(node_list, "lv_list", [vg_name])
 
   def call_vg_list(self, node_list):
     """Gets the volume group list.
@@ -244,6 +452,33 @@ class RpcRunner(object):
     """
     return self._MultiNodeCall(node_list, "vg_list", [])
 
+  def call_storage_list(self, node_list, su_name, su_args, name, fields):
+    """Get list of storage units.
+
+    This is a multi-node call.
+
+    """
+    return self._MultiNodeCall(node_list, "storage_list",
+                               [su_name, su_args, name, fields])
+
+  def call_storage_modify(self, node, su_name, su_args, name, changes):
+    """Modify a storage unit.
+
+    This is a single-node call.
+
+    """
+    return self._SingleNodeCall(node, "storage_modify",
+                                [su_name, su_args, name, changes])
+
+  def call_storage_execute(self, node, su_name, su_args, name, op):
+    """Executes an operation on a storage unit.
+
+    This is a single-node call.
+
+    """
+    return self._SingleNodeCall(node, "storage_execute",
+                                [su_name, su_args, name, op])
+
   def call_bridges_exist(self, node, bridges_list):
     """Checks if a node has all the bridges given.
 
@@ -256,24 +491,77 @@ class RpcRunner(object):
     """
     return self._SingleNodeCall(node, "bridges_exist", [bridges_list])
 
-  def call_instance_start(self, node, instance, extra_args):
+  def call_instance_start(self, node, instance, hvp, bep):
     """Starts an instance.
 
     This is a single-node call.
 
     """
-    return self._SingleNodeCall(node, "instance_start",
-                                [self._InstDict(instance), extra_args])
+    idict = self._InstDict(instance, hvp=hvp, bep=bep)
+    return self._SingleNodeCall(node, "instance_start", [idict])
 
-  def call_instance_shutdown(self, node, instance):
+  def call_instance_shutdown(self, node, instance, timeout):
     """Stops an instance.
 
     This is a single-node call.
 
     """
     return self._SingleNodeCall(node, "instance_shutdown",
+                                [self._InstDict(instance), timeout])
+
+  def call_migration_info(self, node, instance):
+    """Gather the information necessary to prepare an instance migration.
+
+    This is a single-node call.
+
+    @type node: string
+    @param node: the node on which the instance is currently running
+    @type instance: C{objects.Instance}
+    @param instance: the instance definition
+
+    """
+    return self._SingleNodeCall(node, "migration_info",
                                 [self._InstDict(instance)])
 
+  def call_accept_instance(self, node, instance, info, target):
+    """Prepare a node to accept an instance.
+
+    This is a single-node call.
+
+    @type node: string
+    @param node: the target node for the migration
+    @type instance: C{objects.Instance}
+    @param instance: the instance definition
+    @type info: opaque/hypervisor specific (string/data)
+    @param info: result for the call_migration_info call
+    @type target: string
+    @param target: target hostname (usually ip address) (on the node itself)
+
+    """
+    return self._SingleNodeCall(node, "accept_instance",
+                                [self._InstDict(instance), info, target])
+
+  def call_finalize_migration(self, node, instance, info, success):
+    """Finalize any target-node migration specific operation.
+
+    This is called both in case of a successful migration and in case of error
+    (in which case it should abort the migration).
+
+    This is a single-node call.
+
+    @type node: string
+    @param node: the target node for the migration
+    @type instance: C{objects.Instance}
+    @param instance: the instance definition
+    @type info: opaque/hypervisor specific (string/data)
+    @param info: result for the call_migration_info call
+    @type success: boolean
+    @param success: whether the migration was a success or a failure
+
+    """
+    return self._SingleNodeCall(node, "finalize_migration",
+                                [self._InstDict(instance), info, success])
+
   def call_instance_migrate(self, node, instance, target, live):
     """Migrate an instance.
 
@@ -293,33 +581,33 @@ class RpcRunner(object):
     return self._SingleNodeCall(node, "instance_migrate",
                                 [self._InstDict(instance), target, live])
 
-  def call_instance_reboot(self, node, instance, reboot_type, extra_args):
+  def call_instance_reboot(self, node, inst, reboot_type, shutdown_timeout):
     """Reboots an instance.
 
     This is a single-node call.
 
     """
     return self._SingleNodeCall(node, "instance_reboot",
-                                [self._InstDict(instance), reboot_type,
-                                 extra_args])
+                                [self._InstDict(inst), reboot_type,
+                                 shutdown_timeout])
 
-  def call_instance_os_add(self, node, inst):
+  def call_instance_os_add(self, node, inst, reinstall, debug):
     """Installs an OS on the given instance.
 
     This is a single-node call.
 
     """
     return self._SingleNodeCall(node, "instance_os_add",
-                                [self._InstDict(inst)])
+                                [self._InstDict(inst), reinstall, debug])
 
-  def call_instance_run_rename(self, node, inst, old_name):
+  def call_instance_run_rename(self, node, inst, old_name, debug):
     """Run the OS rename script for an instance.
 
     This is a single-node call.
 
     """
     return self._SingleNodeCall(node, "instance_run_rename",
-                                [self._InstDict(inst), old_name])
+                                [self._InstDict(inst), old_name, debug])
 
   def call_instance_info(self, node, instance, hname):
     """Returns information about a single instance.
@@ -336,6 +624,20 @@ class RpcRunner(object):
     """
     return self._SingleNodeCall(node, "instance_info", [instance, hname])
 
+  def call_instance_migratable(self, node, instance):
+    """Checks whether the given instance can be migrated.
+
+    This is a single-node call.
+
+    @param node: the node to query
+    @type instance: L{objects.Instance}
+    @param instance: the instance to check
+
+
+    """
+    return self._SingleNodeCall(node, "instance_migratable",
+                                [self._InstDict(instance)])
+
   def call_all_instances_info(self, node_list, hypervisor_list):
     """Returns information about all instances on the given nodes.
 
@@ -392,31 +694,16 @@ class RpcRunner(object):
 
     @type node_list: list
     @param node_list: the list of nodes to query
-    @type vgname: C{string}
-    @param vgname: the name of the volume group to ask for disk space
+    @type vg_name: C{string}
+    @param vg_name: the name of the volume group to ask for disk space
         information
     @type hypervisor_type: C{str}
     @param hypervisor_type: the name of the hypervisor to ask for
         memory information
 
     """
-    retux = self._MultiNodeCall(node_list, "node_info",
-                                [vg_name, hypervisor_type])
-
-    for node_name in retux:
-      ret = retux.get(node_name, False)
-      if type(ret) != dict:
-        logging.error("could not connect to node %s", node_name)
-        ret = {}
-
-      utils.CheckDict(ret, {
-                        'memory_total' : '-',
-                        'memory_dom0' : '-',
-                        'memory_free' : '-',
-                        'vg_size' : 'node_unreachable',
-                        'vg_free' : '-',
-                      }, "call_node_info")
-    return retux
+    return self._MultiNodeCall(node_list, "node_info",
+                               [vg_name, hypervisor_type])
 
   def call_node_add(self, node, dsa, dsapub, rsa, rsapub, ssh, sshpub):
     """Add a node to the cluster.
@@ -437,14 +724,14 @@ class RpcRunner(object):
                                [checkdict, cluster_name])
 
   @classmethod
-  def call_node_start_master(cls, node, start_daemons):
+  def call_node_start_master(cls, node, start_daemons, no_voting):
     """Tells a node to activate itself as a master.
 
     This is a single-node call.
 
     """
     return cls._StaticSingleNodeCall(node, "node_start_master",
-                                     [start_daemons])
+                                     [start_daemons, no_voting])
 
   @classmethod
   def call_node_stop_master(cls, node, stop_daemons):
@@ -465,13 +752,14 @@ class RpcRunner(object):
     # TODO: should this method query down nodes?
     return cls._StaticMultiNodeCall(node_list, "master_info", [])
 
-  def call_version(self, node_list):
+  @classmethod
+  def call_version(cls, node_list):
     """Query node version.
 
     This is a multi-node call.
 
     """
-    return self._MultiNodeCall(node_list, "version", [])
+    return cls._StaticMultiNodeCall(node_list, "version", [])
 
   def call_blockdev_create(self, node, bdev, size, owner, on_primary, info):
     """Request creation of a given block device.
@@ -542,8 +830,12 @@ class RpcRunner(object):
     This is a single-node call.
 
     """
-    return self._SingleNodeCall(node, "blockdev_getmirrorstatus",
-                                [dsk.ToDict() for dsk in disks])
+    result = self._SingleNodeCall(node, "blockdev_getmirrorstatus",
+                                  [dsk.ToDict() for dsk in disks])
+    if not result.fail_msg:
+      result.payload = [objects.BlockDevStatus.FromDict(i)
+                        for i in result.payload]
+    return result
 
   def call_blockdev_find(self, node, disk):
     """Request identification of a given block device.
@@ -551,16 +843,57 @@ class RpcRunner(object):
     This is a single-node call.
 
     """
-    return self._SingleNodeCall(node, "blockdev_find", [disk.ToDict()])
+    result = self._SingleNodeCall(node, "blockdev_find", [disk.ToDict()])
+    if not result.fail_msg and result.payload is not None:
+      result.payload = objects.BlockDevStatus.FromDict(result.payload)
+    return result
 
-  def call_blockdev_close(self, node, disks):
+  def call_blockdev_close(self, node, instance_name, disks):
     """Closes the given block devices.
 
     This is a single-node call.
 
     """
-    return self._SingleNodeCall(node, "blockdev_close",
-                                [cf.ToDict() for cf in disks])
+    params = [instance_name, [cf.ToDict() for cf in disks]]
+    return self._SingleNodeCall(node, "blockdev_close", params)
+
+  def call_blockdev_getsizes(self, node, disks):
+    """Returns the size of the given disks.
+
+    This is a single-node call.
+
+    """
+    params = [[cf.ToDict() for cf in disks]]
+    return self._SingleNodeCall(node, "blockdev_getsize", params)
+
+  def call_drbd_disconnect_net(self, node_list, nodes_ip, disks):
+    """Disconnects the network of the given drbd devices.
+
+    This is a multi-node call.
+
+    """
+    return self._MultiNodeCall(node_list, "drbd_disconnect_net",
+                               [nodes_ip, [cf.ToDict() for cf in disks]])
+
+  def call_drbd_attach_net(self, node_list, nodes_ip,
+                           disks, instance_name, multimaster):
+    """Disconnects the given drbd devices.
+
+    This is a multi-node call.
+
+    """
+    return self._MultiNodeCall(node_list, "drbd_attach_net",
+                               [nodes_ip, [cf.ToDict() for cf in disks],
+                                instance_name, multimaster])
+
+  def call_drbd_wait_sync(self, node_list, nodes_ip, disks):
+    """Waits for the synchronization of drbd devices is complete.
+
+    This is a multi-node call.
+
+    """
+    return self._MultiNodeCall(node_list, "drbd_wait_sync",
+                               [nodes_ip, [cf.ToDict() for cf in disks]])
 
   @classmethod
   def call_upload_file(cls, node_list, file_name, address_list=None):
@@ -580,7 +913,8 @@ class RpcRunner(object):
         to optimize the RPC speed
 
     """
-    data = utils.ReadFile(file_name)
+    file_contents = utils.ReadFile(file_name)
+    data = cls._Compress(file_contents)
     st = os.stat(file_name)
     params = [file_name, data, st.st_mode, st.st_uid, st.st_gid,
               st.st_atime, st.st_mtime]
@@ -588,13 +922,13 @@ class RpcRunner(object):
                                     address_list=address_list)
 
   @classmethod
-  def call_write_ssconf_files(cls, node_list):
+  def call_write_ssconf_files(cls, node_list, values):
     """Write ssconf files.
 
     This is a multi-node call.
 
     """
-    return cls._StaticMultiNodeCall(node_list, "write_ssconf_files", [])
+    return cls._StaticMultiNodeCall(node_list, "write_ssconf_files", [values])
 
   def call_os_diagnose(self, node_list):
     """Request a diagnose of OS definitions.
@@ -602,16 +936,7 @@ class RpcRunner(object):
     This is a multi-node call.
 
     """
-    result = self._MultiNodeCall(node_list, "os_diagnose", [])
-
-    new_result = {}
-    for node_name in result:
-      if result[node_name]:
-        nr = [objects.OS.FromDict(oss) for oss in result[node_name]]
-      else:
-        nr = []
-      new_result[node_name] = nr
-    return new_result
+    return self._MultiNodeCall(node_list, "os_diagnose", [])
 
   def call_os_get(self, node, name):
     """Returns an OS definition.
@@ -620,10 +945,9 @@ class RpcRunner(object):
 
     """
     result = self._SingleNodeCall(node, "os_get", [name])
-    if isinstance(result, dict):
-      return objects.OS.FromDict(result)
-    else:
-      return result
+    if not result.fail_msg and isinstance(result.payload, dict):
+      result.payload = objects.OS.FromDict(result.payload)
+    return result
 
   def call_hooks_runner(self, node_list, hpath, phase, env):
     """Call the hooks runner.
@@ -659,24 +983,24 @@ class RpcRunner(object):
     return self._SingleNodeCall(node, "blockdev_grow",
                                 [cf_bdev.ToDict(), amount])
 
-  def call_blockdev_snapshot(self, node, cf_bdev):
-    """Request a snapshot of the given block device.
+  def call_blockdev_export(self, node, cf_bdev,
+                           dest_node, dest_path, cluster_name):
+    """Export a given disk to another node.
 
     This is a single-node call.
 
     """
-    return self._SingleNodeCall(node, "blockdev_snapshot", [cf_bdev.ToDict()])
+    return self._SingleNodeCall(node, "blockdev_export",
+                                [cf_bdev.ToDict(), dest_node, dest_path,
+                                 cluster_name])
 
-  def call_snapshot_export(self, node, snap_bdev, dest_node, instance,
-                           cluster_name, idx):
-    """Request the export of a given snapshot.
+  def call_blockdev_snapshot(self, node, cf_bdev):
+    """Request a snapshot of the given block device.
 
     This is a single-node call.
 
     """
-    return self._SingleNodeCall(node, "snapshot_export",
-                                [snap_bdev.ToDict(), dest_node,
-                                 self._InstDict(instance), cluster_name, idx])
+    return self._SingleNodeCall(node, "blockdev_snapshot", [cf_bdev.ToDict()])
 
   def call_finalize_export(self, node, instance, snap_disks):
     """Request the completion of an export operation.
@@ -688,7 +1012,10 @@ class RpcRunner(object):
     """
     flat_disks = []
     for disk in snap_disks:
-      flat_disks.append(disk.ToDict())
+      if isinstance(disk, bool):
+        flat_disks.append(disk)
+      else:
+        flat_disks.append(disk.ToDict())
 
     return self._SingleNodeCall(node, "finalize_export",
                                 [self._InstDict(instance), flat_disks])
@@ -699,21 +1026,7 @@ class RpcRunner(object):
     This is a single-node call.
 
     """
-    result = self._SingleNodeCall(node, "export_info", [path])
-    if not result:
-      return result
-    return objects.SerializableConfigParser.Loads(str(result))
-
-  def call_instance_os_import(self, node, inst, src_node, src_images,
-                              cluster_name):
-    """Request the import of a backup into an instance.
-
-    This is a single-node call.
-
-    """
-    return self._SingleNodeCall(node, "instance_os_import",
-                                [self._InstDict(inst), src_node, src_images,
-                                 cluster_name])
+    return self._SingleNodeCall(node, "export_info", [path])
 
   def call_export_list(self, node_list):
     """Gets the stored exports list.
@@ -732,7 +1045,7 @@ class RpcRunner(object):
     return self._SingleNodeCall(node, "export_remove", [export])
 
   @classmethod
-  def call_node_leave_cluster(cls, node):
+  def call_node_leave_cluster(cls, node, modify_ssh_setup):
     """Requests a node to clean the cluster information it has.
 
     This will remove the configuration information from the ganeti data
@@ -741,7 +1054,8 @@ class RpcRunner(object):
     This is a single-node call.
 
     """
-    return cls._StaticSingleNodeCall(node, "node_leave_cluster", [])
+    return cls._StaticSingleNodeCall(node, "node_leave_cluster",
+                                     [modify_ssh_setup])
 
   def call_node_volumes(self, node_list):
     """Gets all volumes on node(s).
@@ -751,6 +1065,22 @@ class RpcRunner(object):
     """
     return self._MultiNodeCall(node_list, "node_volumes", [])
 
+  def call_node_demote_from_mc(self, node):
+    """Demote a node from the master candidate role.
+
+    This is a single-node call.
+
+    """
+    return self._SingleNodeCall(node, "node_demote_from_mc", [])
+
+  def call_node_powercycle(self, node, hypervisor):
+    """Tries to powercycle a node.
+
+    This is a single-node call.
+
+    """
+    return self._SingleNodeCall(node, "node_powercycle", [hypervisor])
+
   def call_test_delay(self, node_list, duration):
     """Sleep for a fixed time on given node(s).
 
@@ -795,7 +1125,7 @@ class RpcRunner(object):
 
     """
     return cls._StaticMultiNodeCall(node_list, "jobqueue_update",
-                                    [file_name, content],
+                                    [file_name, cls._Compress(content)],
                                     address_list=address_list)
 
   @classmethod
@@ -808,13 +1138,13 @@ class RpcRunner(object):
     return cls._StaticSingleNodeCall(node, "jobqueue_purge", [])
 
   @classmethod
-  def call_jobqueue_rename(cls, node_list, address_list, old, new):
+  def call_jobqueue_rename(cls, node_list, address_list, rename):
     """Rename a job queue file.
 
     This is a multi-node call.
 
     """
-    return cls._StaticMultiNodeCall(node_list, "jobqueue_rename", [old, new],
+    return cls._StaticMultiNodeCall(node_list, "jobqueue_rename", rename,
                                     address_list=address_list)
 
   @classmethod
@@ -846,6 +1176,117 @@ class RpcRunner(object):
 
     """
     cluster = self._cfg.GetClusterInfo()
-    hv_full = cluster.FillDict(cluster.hvparams.get(hvname, {}), hvparams)
+    hv_full = objects.FillDict(cluster.hvparams.get(hvname, {}), hvparams)
     return self._MultiNodeCall(node_list, "hypervisor_validate_params",
                                [hvname, hv_full])
+
+  def call_x509_cert_create(self, node, validity):
+    """Creates a new X509 certificate for SSL/TLS.
+
+    This is a single-node call.
+
+    @type validity: int
+    @param validity: Validity in seconds
+
+    """
+    return self._SingleNodeCall(node, "x509_cert_create", [validity])
+
+  def call_x509_cert_remove(self, node, name):
+    """Removes a X509 certificate.
+
+    This is a single-node call.
+
+    @type name: string
+    @param name: Certificate name
+
+    """
+    return self._SingleNodeCall(node, "x509_cert_remove", [name])
+
+  def call_import_start(self, node, x509_key_name, source_x509_ca,
+                        instance, dest, dest_args):
+    """Starts a listener for an import.
+
+    This is a single-node call.
+
+    @type node: string
+    @param node: Node name
+    @type instance: C{objects.Instance}
+    @param instance: Instance object
+
+    """
+    return self._SingleNodeCall(node, "import_start",
+                                [x509_key_name, source_x509_ca,
+                                 self._InstDict(instance), dest,
+                                 _EncodeImportExportIO(dest, dest_args)])
+
+  def call_export_start(self, node, x509_key_name, dest_x509_ca, host, port,
+                        instance, source, source_args):
+    """Starts an export daemon.
+
+    This is a single-node call.
+
+    @type node: string
+    @param node: Node name
+    @type instance: C{objects.Instance}
+    @param instance: Instance object
+
+    """
+    return self._SingleNodeCall(node, "export_start",
+                                [x509_key_name, dest_x509_ca, host, port,
+                                 self._InstDict(instance), source,
+                                 _EncodeImportExportIO(source, source_args)])
+
+  def call_impexp_status(self, node, names):
+    """Gets the status of an import or export.
+
+    This is a single-node call.
+
+    @type node: string
+    @param node: Node name
+    @type names: List of strings
+    @param names: Import/export names
+    @rtype: List of L{objects.ImportExportStatus} instances
+    @return: Returns a list of the state of each named import/export or None if
+             a status couldn't be retrieved
+
+    """
+    result = self._SingleNodeCall(node, "impexp_status", [names])
+
+    if not result.fail_msg:
+      decoded = []
+
+      for i in result.payload:
+        if i is None:
+          decoded.append(None)
+          continue
+        decoded.append(objects.ImportExportStatus.FromDict(i))
+
+      result.payload = decoded
+
+    return result
+
+  def call_impexp_abort(self, node, name):
+    """Aborts an import or export.
+
+    This is a single-node call.
+
+    @type node: string
+    @param node: Node name
+    @type name: string
+    @param name: Import/export name
+
+    """
+    return self._SingleNodeCall(node, "impexp_abort", [name])
+
+  def call_impexp_cleanup(self, node, name):
+    """Cleans up after an import or export.
+
+    This is a single-node call.
+
+    @type node: string
+    @param node: Node name
+    @type name: string
+    @param name: Import/export name
+
+    """
+    return self._SingleNodeCall(node, "impexp_cleanup", [name])